It was shown that use of inhibited lubricants is an effective method of protecting gas commercial and carrier equipment from corrosion, particularly hydrogen sulfide corrosion. A new inhibited turbine oil,Tp-32R, was developed; it differs from the widely used Tp22s turbine oil due to the higher protective and antiwear properties. The new oil underwent classification tests and tests for compliance with the requirements of Gazprom STO. Key words: Corrosion inhibitor, lube oil, hydrogen sulfide, demulsifier, compressor station.Natural and associated gases and gas condensates in many fields contain corrosive and aggressive contaminants: hydrogen sulfide, mercaptans, carbon dioxide, water, etc. Natural gases and gas condensates from Astrakhan, Orenburg (Russia), Karachagan (Kazakhstan), and Texas (USA), and gases from marine fields in New Zealand, India, Oman, etc. These contaminants cause different types of damage in gas-carrier equipment: corrosion, hydrogen absorption, hydrogen embrittlement, and cracking of steel [1]. In particular, the types of corrosive damage of gas-carrier equipment at the Orenburg gas-chemical complex are reported in Table 1. Monitoring of emergency situations at Gazprom Co. shows that of the causes of pipeline failures, 7% is due to corrosion of the pipes.Equipment made from carbon and low-alloy steels without special protective measures (coatings, inhibition, or others) is subject to hydrogen sulfide corrosion with the rate of up to 2 mm/year (maximum acceptable rate of 0.1 mm/year). Replacement of carbon steel by alloyed steel does not solve the problem of hydrogen sulfide corrosion in gas-carrier equipment. We found [2] that in Tp-22s turbine oil with no additives, the rate of hydrogen sulfide corrosion by alloyed steel 25X1MF is 30% higher than the corrosion rate of carbon steel in similar conditions.Structural inhomogeneity of the steel -the presence of elements with different electrode potentials -is probably the cause of the combined electrochemical and chemical corrosion of the alloyed steel in oil-hydrogen sulfide-electrolyte medium. 19Different methods using inhibitors are used to protect equipment in extraction, primary processing, and transport of hydrogen-sulfide-containing gas, gas condensate, and crude. To protect wells, they are periodically treated with inhibitors, and to protect equipment and pipelines in exhaustive gas processing units (EGPU) and compressor stations, the inhibitors are sprayed in the pipelines; GPP EGPU are swabbed and sprayed with inhibitors to protect connecting gas lines. A number of inhibitors are used for spraying in pipelines and swabbing: domestic INKORGAZ-21T, imported Dodigen 4482-1 (Germany), CIF (Clariant), and others.We investigated the possibility of protecting the parts in the oil systems of gas compressors with inhibitors of hydrogen sulfide corrosion and lubricants made from them from corrosive and mechanical wear. Hydrogen sulfide easily dissolves in turbine oil: up to 200 volumes of hydrogen sulfide per volume of type Tp-22s oil at pressu...

Currently, requirements for the environmental safety of lubricants are being tightened. The production of biodegradable lubricants is growing in European countries. The analysis of the production of biodegradable lubricants in the Russian Federation is carried out. Currently, the range of biodegradable lubricants in Russia is limited due to the lack of capacity for the production of polyalkylene glycol oils and esters. However, increasing environmental requirements in the oil, metallurgical, machine-building, construction industries, energy, agriculture, forestry, and water resources require more and more production of lubricants with high environmental performance. To assess the Biodegradability of Russian lubricants, it is necessary to use GOST 32433-2013 identical to the international standard OECD 301B. It is shown that in European countries, polyalkylene glycols and synthetic esters (diesters and esters) are widely used for the production of biodegradable motor, transmission, hydraulic, and turbine oils. To expand the production of modern biodegradable lubricants in the Russian Federation, it is necessary to develop industrial production of API group V oils. The use of biodegradable greases, coolant and separation lubricants based on vegetable oils is promising.

The reasons for the formation of varnish deposits of turbine oils are determined. It is shown that the performance of turbine oils is determined by methods of ASTM D7843 (MPC) and ASTM D6971 (RUL) can be assessed, the process of formation of varnish deposits, the level of antioxidant properties, antioxidant content of, amend, and extend the oil change, and to predict critical situation in the operation of turbine equipment. The mechanism of formation of varnish deposits in turbine oils is proposed.

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